<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        .q1{
            width: 400px;
            height: 400px;
            background-color: rgb(18, 41, 252);
            box-sizing: border-box;
            padding: 150px;
        }
        .q2{
            width: 100px;
            height: 100px;
            background-color: rgb(28, 243, 9);
        }
    </style>
</head>
<body>
    <div class="q1">
       <div class="q2"></div> 
    </div>
</body>
</html>